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Renesas HZK12ATR-S-E
- Part No.:
- HZK12ATR-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK12ATR-S-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:13,972
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Product details
Overview
HZK12ATR-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power DC supply rails. It delivers a nominal zener voltage of 12 V (11.6–12.7 V at 5 mA), with dynamic resistance of 35 Ω, maximum power dissipation of 500 mW, and operates within a junction temperature range of –55°C to +175°C. It is commonly used in reference voltage generation for analog sensors and microcontroller reset circuits.
For engineers reviewing the HZK12ATR-S-E datasheet, HZK12ATR-S-E pinout, HZK12ATR-S-E application, or HZK12ATR-S-E equivalent, key selection criteria include its 12 V zener tolerance (Grade A), LLD surface-mount package footprint, low leakage current (<1 µA at 9.5 V), and thermal coefficient behavior across ambient temperatures.
Technical Context
The HZK12ATR-S-E employs a planar epitaxial construction to achieve stable reverse breakdown characteristics with low dynamic impedance and minimal temperature drift. Its zener voltage is specified at 5 mA test current, and it exhibits a positive temperature coefficient of approximately +8.5 mV/°C near 12 V, as confirmed by Figure 2 in the official datasheet.
This device operates strictly in reverse-bias mode for voltage clamping or reference functions, with no forward conduction role. It requires external series current limiting and is not rated for surge or transient suppression-its design intent is precision DC stabilization under steady-state conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.6–12.7 V at IZ = 5 mA - defines stable regulation point for low-current references. |
| Dynamic Resistance (rd) | 35 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity. |
| Power Dissipation (Pd) | 500 mW max on PCB - sets absolute upper limit for continuous DC power handling. |
| Reverse Leakage (IR) | ≤1 µA at VR = 9.5 V - ensures minimal quiescent current in high-impedance bias networks. |
| Junction Temperature (Tj) | –55°C to +175°C - supports operation in industrial and automotive under-hood environments. |
| Package | LLD (leadless, 2-pin surface-mount) - enables high-density PCB layout and reflow compatibility. |
Pinout & Package
Package: LLD (Leadless Low-profile Diode), JEITA unregistered, mass ≈ 0.027 g, dimensions per page 6: 1.4 mm diameter × 3.5 mm height, cathode band marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-bias terminal | Connected to regulated voltage node; accepts current flow into diode during breakdown. |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common or ground; establishes reference potential for zener voltage drop. |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 35 Ω max ensures tight voltage regulation under varying load currents up to 5 mA. |
| Grade A zener tolerance | ±0.55 V (11.6–12.7 V) enables predictable reference accuracy without post-calibration. |
| High-temperature operation | Rated to +175°C junction temperature supports use in thermally demanding enclosures. |
| LLD surface-mount package | Compact 1.4 mm Ø footprint reduces board area and supports automated high-speed placement. |
Applications
| Microcontroller Reset Circuit | Analog Sensor Reference |
|---|---|
Use Scenario: Generating a stable 12 V threshold to trigger a supervisor IC's reset output during brown-out. IC Role / Device Role / Timing Role: Zener diode provides precise, temperature-compensated voltage reference for reset comparator input. Use Value: Enables reliable reset assertion at 12 V ±0.55 V across –40°C to +85°C ambient, minimizing false resets. |
Use Scenario: Supplying excitation voltage to a 4–20 mA current-loop pressure transducer requiring stable 12 V bias. IC Role / Device Role / Timing Role: Functions as shunt regulator to maintain constant voltage across transducer's internal circuitry. Use Value: Maintains <1 % regulation error over 1–5 mA load range due to 35 Ω dynamic resistance and low leakage. |
| Low-Power Voltage Monitor | ADC Reference Stabilizer |
Use Scenario: Monitoring 12 V rail integrity in battery-powered IoT edge nodes with ultra-low standby current. IC Role / Device Role / Timing Role: Serves as passive voltage threshold detector feeding GPIO interrupt input via resistor divider. Use Value: Draws ≤1 µA at 9.5 V, extending battery life while maintaining detection accuracy within Grade A tolerance. |
Use Scenario: Stabilizing reference input to a 12-bit SAR ADC in an industrial data acquisition module. IC Role / Device Role / Timing Role: Provides low-noise, low-drift DC reference source decoupled from noisy system rails. Use Value: Reduces ADC INL error by limiting reference voltage drift to <±0.1 %/°C via known zener tempco behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12 | Same 12 V nominal, SOT-23 package, 350 mW rating, higher rd (40 Ω typical). | Higher thermal resistance limits sustained power in compact layouts; less suitable for >2 mA continuous loads. | Prefer HZK12ATR-S-E when PCB space allows LLD and full 500 mW derating is required. |
| MMSZ4687 | 12 V nominal, SOD-123 package, 500 mW rating, tighter VZ tolerance (±5 % vs. Grade A's ±4.6 %), rd = 30 Ω. | Slightly better regulation but lower max Tj (+150°C); not qualified for >125°C ambient without derating. | Choose MMSZ4687 only if SOD-123 footprint is mandatory and operating ambient stays below 105°C. |
Compared with BZX84-C12 and MMSZ4687, the HZK12ATR-S-E offers superior thermal capability (175°C Tj) and verified Grade A tolerance in the LLD package-critical for industrial designs where long-term stability and high-temperature reliability outweigh footprint constraints.
Availability
HZK12ATR-S-E is available at Aetrix Electronics and suitable for microcontroller reset circuits, analog sensor references, low-power voltage monitors, and ADC reference stabilizers requiring stable component supply and long-lifecycle support.
Supply support for HZK12ATR-S-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices, with global R&D and manufacturing infrastructure.
The HZK Series was developed by Renesas Electronics specifically for precision DC voltage stabilization in industrial and consumer power management systems, emphasizing low leakage, repeatable zener characteristics, and robust thermal performance.
FAQ
What is the exact zener voltage range for HZK12ATR-S-E at 5 mA?
The HZK12ATR-S-E has a guaranteed zener voltage range of 11.6 V to 12.7 V when tested at IZ = 5 mA and Ta = 25°C, corresponding to Grade A specification per the Renesas HZK Series datasheet Rev.3.00. This tolerance is confirmed in the Electrical Characteristics table on page 3 and applies directly to the HZK12ATR-S-E variant.
Is HZK12ATR-S-E RoHS compliant?
Yes, HZK12ATR-S-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation and product marking. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and this applies to all production lots of the HZK12ATR-S-E.
Can HZK12ATR-S-E be used in place of HZK12B?
No-HZK12ATR-S-E and HZK12B are distinct variants: HZK12B is Grade B (12.4–13.4 V), while HZK12ATR-S-E is Grade A (11.6–12.7 V). Their zener voltage ranges do not overlap, and substituting one for the other risks incorrect regulation thresholds. Always verify grade designation before replacement; HZK12ATR-S-E must be used where Grade A tolerance is required.
What is the maximum continuous reverse current HZK12ATR-S-E can handle?
The HZK12ATR-S-E is rated for continuous operation up to 5 mA at 25°C ambient, based on its 500 mW power dissipation limit and 12 V zener voltage. At higher currents, thermal derating is required per Figure 3 (Power Dissipation vs. Ambient Temperature), and exceeding 5 mA without adequate heatsinking risks junction temperature exceeding 175°C.
Does HZK12ATR-S-E have a specified temperature coefficient?
Yes-the HZK12ATR-S-E exhibits a positive zener voltage temperature coefficient of approximately +8.5 mV/°C near 12 V, as shown in Figure 2 (Temperature Coefficient vs. Zener Voltage) of the official datasheet. This value is typical for 12 V zeners in the HZK Series and must be accounted for in precision reference designs operating across wide temperature ranges.
HZK12ATR-S-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZK12ATR-S-E FAQ
1.How can I place an order for HZK12ATR-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK12ATR-S-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HZK12ATR-S-E reliable?
The price and inventory of HZK12ATR-S-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK12ATR-S-E is usually 5 days.
3.What payment methods are accepted for HZK12ATR-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK12ATR-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK12ATR-S-E?
HZK12ATR-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK12ATR-S-E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HZK12ATR-S-E?
For technical support, including HZK12ATR-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK12ATR-S-E requirements.
6.How does Aetrix verify that HZK12ATR-S-E is sourced from the original manufacturer or authorized distributors?
All HZK12ATR-S-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HZK12ATR-S-E meets industry standards.
7.What is the process for return or replacement of HZK12ATR-S-E?
All HZK12ATR-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK12ATR-S-E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HZK12ATR-S-E part is unused and in its original packaging.
Return procedure for HZK12ATR-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK12ATR-S-E Tags
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